ADH was contracted by Beale Air Force Base (AFB) to provide services in satisfaction of its Performance Work Statement (PWS). The PWS requires performance of a quarterly groundwater monitoring program, wastewater treatment plant (WWTP) sampling and reporting, stormwater sampling, military family housing, hazardous waste sampling and analysis in accordance with Beale AFBs’ Waste Discharge Requirements (WDRs) for this 22,944 acre facility.

In addition, a Quality Assurance Project Plan (QAPP) was prepared for the Sampling, Analysis, and Monitoring (SAM) Program for Wastewater, Stormwater and Hazardous Waste. The QAPP specifically addressed the SAM monitoring tasks; general procedures and protocols related to sample collection and handling; hazardous waste and military family housing tasks; and, any emergency sampling and analysis that may be required.

Beale AFB owns and operates a wastewater collection, treatment, and disposal system, and provides sewerage service to domestic and industrial users. The base currently holds two WDR RWQCB Orders for all land-based discharge from the WWTP and a groundwater treatment plant. ADH performed sampling and analysis of 14 groundwater monitoring wells under direction of the Air Force (9 CES/CEAN) and in accordance to the WDRs. Based on the results of the sampling, ADH prepared and submitted reports to of 9 CESICEAN on a quarterly basis including the following:

Field methods for groundwater elevation measurements, well purging, water quality measurements, and sampling including metals field filtering.

Calculation of groundwater elevations, an assessment of groundwater flow direction and gradient on the date of measurement, comparison of previous flow direction and gradient data, and discussion of seasonal trends, if any.

A narrative discussion of the analytical results for all groundwater locations monitored including spatial and temporal trends referenced to data tables and graphs.

A comparison of monitoring data to the groundwater limitations and an explanation of any violation of those requirements based upon applicable WDRs.

Under a separate contract, based upon ADH recommendations, ADH performed a statistical regression analysis of four years of ground water chemistry data from Beale AFBs’ two treatment pond monitoring wells to determine if any well had higher concentrations of constituents of concern when compared to background data. Procedures recommended in Statistical Analysis of Groundwater Monitoring Data at RCRA Facilities, Unified Guidance (March 2009) were followed to perform this analysis. Analysis of Variance (ANOVA) techniques were used to compare mean concentrations of various chemical constituents at the wells at each pond with background levels.

For the WWTP program, ADH performed twice weekly water quality sampling and physical measurements on the influent to the wastewater treatment plant, and the effluent from Primary Clarifier, Secondary Clarifier and Contact Basin. Influent, Primary Clarifier, and Secondary Clarifier samples were 24-hour composite samples, and Contact Basin effluent samples were collected as grab samples. Reports that include physical measurements and analytical chemistry results were prepared for the mid-month effort, and an end of the month report.

ADH supported Beale in accordance with their National Pollutant Discharge Elimination System (NPDES) General Industrial Storm Water Permit, eight storm water locations were monitored twice annually. Samples were collected for several constituents and measurements of several other parameters were performed in the field. ADH maintained records of observations, and responses taken to eliminate unauthorized non-storm water discharges.

ADH collected a composite sample of digested sludge at the WWTP from the sludge drying beds at the WWTP annually in accordance with EPA's Publicly Owned Treatment Works (POTW) Sludge Sampling and Analysis Guidance Document.

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